Zhaocai tree is mainly used in courtyard and street trees, potted cultivation at home and so on. The meaning of Zhaocai tree is auspicious. Many people like to plant it, but we often have some yellowing leaves when we breed it. Here are the ten situations we analyzed and the solutions:
The cause analysis and treatment methods of diseased Zhaocai tree leaves are as follows: 1. Poor ventilation leads to yellowing of Zhaocai tree leaves: if too much nitrogen fertilizer is applied, the branches and leaves will grow luxuriantly, in addition, long-term pruning will result in insufficient light in the bore branches and leaves, which will easily cause the leaves to turn yellow and fall off.
Solution: fertilization should be reasonable and pruning should be strengthened to make it ventilated and transparent.
2. Long term water shortage leads to yellowing of the leaves of Zhaocai tree (dry yellow): the missed watering of flowers or long-term watering of half waist water (i.e. upper wet and lower dry) will affect nutrient absorption, and also easily cause dark and dull leaves and drooping leaves. First, the lower old leaves aged, and gradually from the bottom to the top withered off.
Solution: at this time, a small amount of watering and water spraying are needed to make it recover gradually and then turn to normal watering.
3. The acid soil leads to yellowing (burning yellow) of the leaves of Zhaocai tree: the red loam soil in the south is acid, and magnesium is easy to be lost. Planting flowers and trees that are alkali resistant or like to be slightly sealed soil, such as Nerium indicum, boxwood, Jasminum nudiflorum, etc., often appear the phenomenon of chlorosis and yellowing between the veins of old leaves.
Solution: calcium magnesium phosphate fertilizer or spraying magnesium sulfate solution.
4. Dry air leads to yellow leaves of Zhaocai tree: when the indoor air is too dry, some flowers, such as Chlorophytum and orchid, which like humid environment, often have the phenomenon of withered leaf tips or scorched leaf edges.
Solution: water spray and plastic film cover should be taken to increase air humidity.
5. Lack of sunlight leads to yellowing of the leaves of Zhaocai tree. If the flowers like sunshine are placed in the shade for a long time or in places with insufficient light, the branches and leaves will turn yellow.
Solution: in the morning and in the evening, we should move the tree to the sun.
6. High temperature leads to yellowing of leaves of Zhaocai tree: Breeding in high temperature and direct sunlight in summer can easily cause leaf tip and edge of young leaves to wither, or yellow leaves to fall off.
Solution: timely move to a well ventilated and cool place, water the leaf surface to increase air humidity to achieve cooling effect.
7. Low temperature leads to yellow leaves of Zhaocai tree: in winter, when the room temperature is too low, flowers are easy to suffer from cold damage, which leads to yellow leaves and even death in severe cases.
Solution: please pay attention to adjust the room temperature in time.
8. Excessive fertilization of Zhaocai tree results in yellowing of its leaves: excessive fertilization will cause new leaves to be thick and uneven, and old leaf tips will be burnt yellow and fall off,
Solution: should immediately stop fertilization, increase the amount of water, so that the fertilizer from the bottom of the drainage hole, or immediately pour the basin, wash the soil lump with water, and then replant it into the basin.
9. The results showed that the leaves of Zhaocai tree turned yellow after long-term fertilization: no ammonia fertilizer was applied for a long time or the pots were not changed to replace the soil, and the nutrient elements such as nitrogen in the soil were deficient, resulting in the branches and leaves being thin and yellow.
Solution: it is necessary to pour the basin in time, change into new loose and fertile culture soil, and gradually increase the application of thin and rotten liquid fertilizer or compound flower fertilizer.
10. Diseases and insect pests lead to yellow leaves of Zhaocai tree: leaf spot disease caused by fungi and other pathogens can easily cause local necrosis of leaves and yellow spots or patches. In serious cases, the whole leaves will wither and fall off. After being infected by mosaic virus, yellow and green mottled leaves will appear. When damaged by scale insects and red spiders, the leaves will become local yellow withered, and even the whole leaves will wither.
Solution: timely spraying.
The maintenance experience of Zhaocai tree: 1. Water the Zhaocai tree once every ten days and a half months. It is not allowed to water too much. The basin soil is too wet for a long time, resulting in anoxia in the soil, causing some fibrous roots to rot, hindering normal respiration and water and nutrient absorption, and causing the leaves to turn yellow and fall off. After the damage, the young leaves turn pale yellow, and then the old leaves gradually turn yellow. Therefore, watering should be controlled immediately, fertilization should be suspended, and the soil should be loosened frequently to make the soil ventilate well.
2. Water moderately, add potash fertilizer or compound organic fertilizer. If the daily light time is very short, it is recommended to lengthen it, at least 3 to 4 hours. Fertilizer and turning the basin at the same time, the effect is better. In addition, the newly grown nodes will be thinner.